Q. To determine the Young’s modulus of a wire, the formula is $Y = \frac{F}{A} \times \frac{L}{\mathrm{\Delta}L}$; where $L =$ length, $A =$ area of cross-section of the wire, $\mathrm{\Delta}L =$ change in length$\$of the wire when stretched with a force $F$. The conversion factor to change it from CGS to MKS system is
A) 1
B) 10
C) 0.1
D) 0.01
Explanation
$Y = \frac{F}{A} \bullet \frac{L}{\mathrm{\Delta}L} = \frac{dyne}{cm^{2}} = \frac{10^{- 5}N}{10^{- 4}m^{2}} = 0.1\ N/m^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.